refactor(support): complete toIntIds() rollout in tenant-area code

Final pass over tenant repositories and TenantScopeService, collapsing
the remaining two-line intval+filter and one-line intval+unique patterns
onto the shared `toIntIds()` helper. The inline pattern is now gone
from the codebase.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

core/Repository/Tenant/TenantRepository.php

@@ -82,8 +82,7 @@ class TenantRepository implements TenantRepositoryInterface
         }
         if (array_key_exists('tenantIds', $options)) {
             $tenantIds = $options['tenantIds'];
-            $tenantIds = is_array($tenantIds) ? array_values(array_unique(array_map('intval', $tenantIds))) : [];
-            $tenantIds = array_values(array_filter($tenantIds, static fn ($id) => $id > 0));
+            $tenantIds = is_array($tenantIds) ? toIntIds($tenantIds) : [];
             if ($tenantIds) {
                 $where[] = 'tenants.id in (???)';
                 $params[] = $tenantIds;